The Short Answer: It depends on the scope of work, but for most major renovations, yes.
The Details: If you are simply painting or replacing flooring, you generally do not need a permit. However, you do need a permit if you plan to:
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Remove or alter walls (structural changes).
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Add or move plumbing (e.g., adding a bathroom or laundry).
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Enlarge windows (often required for bedrooms).
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Create a Legal Secondary Suite (basement apartment) for rental income.
How CMY Helps: Navigating city bylaws in Toronto and Mississauga can be confusing. We manage the entire process for you—from creating the architectural drawings to submitting the application and scheduling inspections—ensuring your renovation is safe, legal, and built to code.